<?php get_header(); ?>
<?php
if (in_category(4)) {
include(TEMPLATEPATH.'/single1.php');
} elseif (in_category(5)) { 
include(TEMPLATEPATH . '/single2.php');
} elseif (in_category(6)) {
include(TEMPLATEPATH . '/single3.php');
} elseif (in_category(7)) {
include(TEMPLATEPATH . '/single4.php');
} elseif (in_category(8)) {
include(TEMPLATEPATH . '/single4.php');
}?> 
<?php get_footer(); ?>